Rotary pulverizing-maghine



ROTARY PULVBRIZING :lm xculf;l

Pate'ted Deo. 3, 1889.

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. ROTARY PULVERIZING MAGHlNE. No. 416,252.

APatented Deo. 3, 1889.

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JOHN J. BORDMAN, OF BROOKLYN, 'NEW YORK.

ROTARY Pu LvE'RiziNG-M'ACH N E.

sPncIFIcATIoN forming pm of Letters Patent No. 416,252, dated December e, 1889. Application tiled l'uly 5,1888. Serial No.'279,017. (No model.)

To allwhom it may concern:

Be it known that I, JOHN J. BORDMAN, a citizen of the United States, and a resident of Brooklyn, Kings county,and Stateof .New York, haveinvented a certain new and useful Improvement in Rotary' Pulverizing Ma-` chines, of which the following is a specication.

My invention relates to improvements in machines for reducing and pulverizing mineral and other fuels, and forv supplying the same, mixed with air sufficient to insure comfsf bustion, to all classes of furnaces, and gen` showing the side wall ofthe 4machine and 'of the hopper partly broken away; Fig. 2, acrosssection of the blowing-compartment on'the line 2 2 of Fig. 2; Fig. 3, an end view of the machine, showing the airfpassage partly broken away; Fig. 4, a sectional view on' the line 4 4, Figyl; Fig. 5, a view of the mechanism for adjusting the fanfblades; Figs. 6 and 7, an alternative method of adj listing the fanblades; Fig. yS, a view showing the construction of the feed-rollers; Fig. 9, a side elevation of the machine with a portion of the upper half of the shellbroken away; Fig. 10, a plan view of t-he lower half of the shell; Fig. 11, a detail view of the beaters, and Figs. 12

and 13 views of the method of attaching thel lining to the shell and closing the two portions of the latter.

Similar letters refer to similar parts th roughout the several views.

' The machine is made in the form ofl a hollow cylinder composed of two hollow sections A and A2. This cylinder will vary in diameter.

according to the size of the machine. The l end walls planes.

- The machine and its various parts are made Vof cast-iron or any other convenient material and the walls may be of any convenient thickness. The cylinder is made in two horizontal of the machine are in parallel sections placed upon each other, as shown in 'the views. The lower section A2 is cast with the standards S at either end and a flange e upon its upper surface, upon which rests a corresponding flange e, cast upon the lower face of the upper section,as shown in the views. The tw'o sections are held together by the devices shown in detail in Figs. 9, 10, 12, and 13. The section A2'is cast withtwo pairs of lugs b2 b2 upon itsrear edge, Figs. 9, 12, and 13, and the upperv section A with two horizontal lugs a a', each'provided with an opening ctl therein, which receives the bolts b' b', which are pivoted inthe lugs b2 b2 by the bolts bs b3, around which they are free to rotate. The bolts .lV-b each terminate in a beveled projecting piece b4 b4, which comes in contact with the 'surface of 4the lower shell A2 when the upper shell is opened, and holds the -latter at any desired angle. The bolts b b are provided with the screw-nets b b, by screwing which downpon the bolts the two portions of the cylinder are securely heldtogether. At the front side of the cylinder the two sections of the same are secured in a substantially similar manner. The horizontal lugs ct' a' are, however, replaced by the open lugs' a5 a5, Figs. l0, l2, and 13, provided with the openings (t3 for'receiving the bolts c2 c2, which bolts are swivele'd in bearings c' c', cast on the upper edge of the lower half of the shell A2 and rotate on'the pins c'c, but are not provided with a projecting head, and when released from the lugs a5 0.5 drop down and hang loosely. The bolts c2 are held in the lugs a5 a5 by means of `the screw-nuts c3 c3, whichscrew over their extremities c* c4 and down upon .the upper faces of the lugs, as shown in Figs. l2' and 13. In this way the joint formed by the flanges @and e ot' the sections A' land A2 may be made more of less tight by screwing thc nuts b l) and c3 c3 up or down. lVhen it is desired to open the cylinder, thc nuts 'c3 osare slackened and the bolts c2 c2 released. The nuts b b are slackened and the upper half A' of the cylinder rotated upward around the hinge-jointformed 'by the pins b3 b3 in the lugs b2 b2.

In order to facilitate the maintenance of a perfectly-tight joint between the two parts of the shell, either or both of the flanges e and e', but preferably theV flange e, are provided with a mortised cut or indentation on its upper surface, which is filled with a packing, Figs. 10, 12, and 13, of gutta-pereha or other suitable material, the outer surface of which packing is firmly pressed against the surface of the flange e' on the section A2 when the nuts b b and c2 c2 are screwed down on the bolts b' b c2 c2. This packing may be readily renewed if the same becomes Worn out.

The interior of the machine is divided by the diaphragm D into two compartments--a blowing-compartment C and a pulverizingcompartment C, of any convenient size. The diaphragm D isprovided at its center with a circular opening d, for the passage` of the ma'- terial from one compartment to the other.

, The interior of the pulverizing-compartment C-is lined with a lining of sheet metal, madein two sections, as shown in Figs. 12 and`18. The lining is attached to the shell of the machine by means of the bolts w, passing through the same, with the screw-nuts w. The 4heads 102 of these bolts are made curved both interiorly and exteriorly, asshown in Fig-12, and the lining is bent in around the edges of the openings to receive the inner curved surfaces of the heads, and the inner surface of the shell is cuntersunk around the openings through which the bolts pass to receive the'cupped portion of the lining,'as shown in that figure. In this way'an almost smooth surface is presented to the material to be pulverized around the bolt-heads.

, Through the center of the cylinder, and

consequently through the opening d in the` diaphragm, passes a horizontal shaft E, which passes out through openings E E', formed in the end walls of the shell, and. is supported upon the exterior bearings B B, made ofantifriction metal, which are carried `upon Vthe brackets B B, attached to the vertical end walls of the machine. The shaft E maybe of any convenient diameter, but must have sufficient strength to carry the rotary beaters I I and the fan F, and thebearings and their brackets will varyin size according to the size of the pulverizer, the weightof the rotary blowing-fan F,and the rotary beaters.

The pulverizing-compartment (i contains any number of sets of rotary beaters, ac-

cording to its length, arranged as shown in the drawings. Any number ofl rot-arybeaters may be arranged radially around the shaft E; but in practice two sets of four will be found most convenient, as shown i'n the views. j In the pulverizing-compartment C the rotary beaters I I I, e., are mounted rig.-

idly upon the axis of rotation and with their ties they terminate in short cross-heads k', and are beveled to fit a mortised groove k of corresponding shape in the flange 'i' of the collar if. They are attached to the collar by means of the screw-bolts i2 2, passing tlfrough the beveled cross-head and the collar. At the outer extremity the radial arms i3 terminate in the cylindrical heads 7, which have the rectangular cross-heads 4i i6, with the beveled edges shown in the views, cast on them in a single piece. The shoes Iof the beaters have sunken faces with beveled edges, as particularly shown in Fig. 13, so that webs are formed on the periphery, and lthey are fastened to the cross-heads by means of the bolts i4, with the heads z2, securely held in place by the nuts i5. Then the cross-heads are bolted to the radial arms, the beveled edges of the cross-heads i fit into the corresponding edges of the sunken faces, andso prevent all twisting or turning of the crossheads on the arms. When the front faces or the webs of the shoes become worn, the bolts can be unscrewed and the shoes turned over `and a fresh surface exposed to the wear of grinding,- thus saving the necessity of using new shoes each time that the grinding-surface becomes worn down.

The compartment C contains the rotary blowing-fan F, which is mounted upon the shaft E, and the blades of which are arranged so as to be adjustable at any angle to the axis of the main shaft, as shown in Figs. 1, 2, and

5, or laterally, adjustable at any angle to the axis of 'the main shaft, as shown in Figs. (i and 7.

In Figs 1 and 2 F represents the fanblades, of which theremay be any n umher, but preferably two, as shown. These are hinged by means of the lugs ff, cast upon their rear faces, and by'vv the pivot f to the radial arms f2, cast in one piece -with the huh F', which in turn is keyed to the main driving-shaft E by the key p. At the inner edge of each fanblade is cast a projecting piece f7, Fig. 1, which is hinged by thelever f 5 to an arm f", cast upon an independently-rotating collar F3 upon the shaft, E, surrounding an interior fixed'shoulder By rotating the collar F3 on the shaft the angular inclination of lthc fan-blades may be varied, as shown in Fig. 2. 'In order to rotate this collar F3 an independent interior sleeve F2 is used. This latter sleeve surrounds and rotates on the shaft E, but at the same time rotates freely within the collar F2, which is held in place by the independent fixed sleeve F5. VVThe collar F3 is provided, as shown in the views, with aninclined slot g', in which a stud g, inserted in the sleeve F2, is arranged to slide freely. The sleeve F2 extends outward around the shaft E, through the opening E in the end walls of .the machine, and terminates in a loose strap F,-working in a groove on the sleeve,` to lwhich is attached the extremities of the double forked lever h h by means of the pivots h'. The level' 7L is pivoted on the arm l at IOC IIO

, more or less, according as the spur-gear Z3 is.

ditional stud g2 is placed on the driving-shaft E and a straight slot g3 is provided in the sleeve F2. The driving-shaft E is driven at either end by means of a belt passing over the pulley E2 from any suitable source of power. i

When a lateral adjustment of the fanblades is desired, the form of adjustment shown in Figs. 6 and 7 is used. In these views,

lL represents one of the blades; L2, a collar on the driving-shaft, provided with arms having bearings n, in which the radial arms L of .thefans rotate. The inner extremity of each arm carries 'a segment of a/'gear-wheel Z, which meshes into a gearing' Z2 Z3, cast on the inner end of a sleeve L3. on the driving-shaft E. slot n', one part of which runs in an inclined direction to the axis of the shaft and the other part runs parallel thereto, which slides upon a st-ud'or tongue n, inserted insa slot in the upper surface of the shaft E, and is connected with the sliding sleeve F4, moved by the forked lever h inthe same manner as the corresponding sleeve F4 in Figs. 1 and' 5. By sliding the collar F4 on the shaft E thetongue n is moved intothe inclined portion of the slot n and the .Spur-gear Z3 revolved, so causing the V blades to be inclined rotatedp In order to supply the necessary amount of air to the machine, to lbe mixed with the pulverized material, in case the machine is used for pu'lverizing coal or other fuel, an air passage 0 is provided at either end, as shown in Figs. 1, 3, and 4. This passage takes iup its air at the periphery of the machine, where a radial lvalve O is provided for regulating the amount of air admitted.

The advantages of carrying the passage outward to the periphery of the cylinder are, first, a stronger draft is produced through the machine, as the passage then serves asa flue, and, secondly, the air-openingis carried away from the moving shaft a'nd feeding mechanism, the proximity of which serves to disturb the' iiow of the air as it ent-ers and to make the draft irregular.' 'lhe'air-passage enters the cylinder at the point marked by the ar row-head in Fig. 3, directly under and adjacent to or around the shaft E, if necessary.

. The discharge from the machine is'eifected through the tangential discharge-pipe K,

opening out of the blowing-compartment C',

and provided on its exterior facewith a ange K', for facilitating the connection between it and the pipe or other receptacle into which t-he discharge iseifected.

The sleeve L3 is provided with a bent.

f The material to be supplied to the machine is subjected to a preliminary crushing by the feed-rolls T T, placed in the hopper H4.

H2 is the mouth of the hopper, which is cut olf at times from the hopper proper, as may be desired, by`the sliding gate H2, sliding in grooves between the flanges H3 H3.

The hopper proper is designated by H4, and-fis provided on its front face with a door H', whereby access may be obtained to the interior. Below the feed-rolls T T the hopper terminates in an inclined pipe H5, which enters the cylinder at the point V, through which the material fed bythe feed-rolls T T falls. The rolls are driven intermittently by means of an arrangement of devices shown in Fig. 3. The roll-shafts terminate in the spindles 1 r', each of which carries a spurwheel R Rf with the teeth rr. The spurwheel R on the shaft ot' the left-hand feedroll is driven from right to left by a pawll s, pivoted at s4 to the bell-crank lever 37. The spur-wheel R on the shaft of the right-hand feed-roll is driven from left to right by a pawl s,pivotedat S5 to the bell-crank lever 87. The rocking motion is imparted to the bell-crank lever bymeans f a connectingrod'fm, connecting with the crank-disk G.

yThe lower etremity of the rod m3 is pivoted lOO which can be driven from the main shaft or any other source of power. between the bell-crank lever S7 and the connecting-rod 'm3 is-made by means ofthe thumb-screw' connection S9, which slides in the link s2 upon the right-hand end Of the bell-crank S7. By turning the handle of the thumb-screw' s?, the connecting-rod vmay be connected with thev bell-crank at any desired point. 'The left-hand roll is arranged toslide laterally in movable bearings, so as to be made-to approach or recede from the 'other roll. The spindle r is journaled in the sliding box lr2,vvhich box is moved by'means of the screw r4, whichx is'tured by the screwhead fk5. By turning the screw-head 75 the 1eft-hand roll is caused t'o approach to or recede from the otherroll any desired distance, and'is firmly set in each position'. When the crank-disk G rotates upon the shaft G, the

.connecting-rod m3 rises or falls with the disk and raises or depresses the end of 'the rocking levers?. The raising or lowering of this end of the bell-crank s'causes' the pawls s `and s to engage alternately with the cogs of The connect-ion IIO IIS

the wheels R' and R, thereby giving a pecui liar `motion to' each *of the feed-rolls T T, causing the particles between them to be fed tothe machine at any desired rate of speed. The speedof the crushing-rolls can be va- .ried by varying the speed of the shaft G.

The form of feedrolls employed are of the shape shown in Fig. 8. -Each roll is made up of separate segments lf2 t2 t2, all fixed in the same shape, which may be replaced from time to time as they wear down without replacing the entire rolls. The grooves t t on t-he surface of the rolls may be of any shape, but preferably, however, of the shape shown in Fig. 8. In Fig. 1 the segments composing the feed-rolls are not shown on account of the smallness of the scale.

The method of operation of the machine is as follows: The material to be pulverized is fed into the hopper Il in suitable quantities, falls upon the feed-rolls, and is sized by them to a certain extent and enters the machine at O2, together with a certain amount of air, and is immediately taken up by the rotary beaters I I, which revolve at a4 high rate of speed,and is reduced by them to an impalpable powder. The rotary blowing-fans F F or L L cause the currents of air which enter the machine at the points O O to rotate rapidly and to carry with them the particles of pulverized material and discharge them at the periphery of the machine through the dischargepipe K.

I claiml. In a pulverizing-machine, the combination, substantially as hereinbefore set forth, with the pulverizingchamber, of a blowingcompartment containing a rotating shaft having radial arms thereon and fan-blades piv- .oted thereto, a rotating sleeve on said shaft extending outward through the end walls of the machine, connected by levers with the fau-blades for varying the inclination ol' the blades to the axis of rotation from the out# side of the machine without opening the shell, and means, substantially as described, for moving and holding said sleeve.'

2. In a Vpulverizing-machine, the combination, substantially as hereinbefore set forth, with the pulverizing-chamber, of a blowingcompartment having in its interior a rotary fan composed of one or more radial arms carried on a shaft rotating therein, a fan-blade pivoted to each said arm, and a projecting arm on the inner edge of said blade, a rotating collar on said shaft provided with an inclined slot, radial arms on said collar pivot- Aally connected to the projecting arms upon the fan-blades, a hollow sleeve surrounding the drivingJsliaft, projecting at one end into the interior of said collar and provided on its upper surface with a stud engaging with said slot and projecting at the otherend outward through the end walls of the cylinder, and means, substantially as described, whereby said sleeve is moved longitudinally on the driving-shaft and the inclination ot' the fanblades correspondingly changed.

3. In a pulverizing-machine, the combination, with the end compartment, of an airduct for admitting air thereto formed upon the end wall of said compartment and terminating at its inner extremity within the compartment at or near the center of the same and at its outer extremity at or near the periphery of the machine.

4. In a pulverizing-machine,.the combination, with the end compartment, of an airduct for admitting,r air thereto formed upon the end wall of said compartment and terminating at its inner extremity Within the compartment at or near the center of the same and at its outer extremity at or near the periphery of the machine, and a valve in said duet for regulating the amount of air admitted thereto.

5. In'a pulverizing-machine, the combination, substantially as hereinbefore set forth, with the end compartment, of an air-duct cast in one piece with said compartment upon the outer wall of the same and terminating at its inner extremity within the co1npartment at or near the center of the same and at its outer extremity at or near the periphery of the machine, and a valve in said duct for regulating the amount of air admitted thereto.

In a pulverizing-machine, the combination, substantially as hereinbefore set forth, with the blovvingcompartment, of a rotary shaft carrying one or more radial arms, a fanblade pivoted to each of said arms and connected by pivoted levers with a sliding collar provided with an inclined slot upon said shaft, whereby the inclination of the blades is varied, a double-forked lever pivoted to the exterior of the machine, one fork of which eneircles the sleeve and actuates the same, and a stationary rod upon the exterior of the machine, which the other fork of said lever encircles, and screw-nuts on said rod for actuating and holding said lever, substantially as described.

T. ln a pulveriziiig-machine, the combination, substantially as hereinbefore set forth, with the feedinghopper, of a pair ot' crushing-rolls in the interior of the same, a gearwheel outside of the hopper upon the extreinity of the shaft ofeach roll, a pair of weighted pawls engagingy with and actuating each gearwheel, a bell-crank to which said pawls are pivotod, a rotary crank-disk act-uated from a suitable source of power, and a connecting-rod connecting the extremity of the bell-crank with the crank-disk.

S. In a pulverizing-inachine, the combination, substantially as hereinbefore sot forth, with the feeding-hopper, of a pair of crushingrolls in the interior of the same, a gear-wheel outside of the hopper upon the extremity of the shaft of cach roll, a pair of weighted pawls engaging with and actuating each gear-wheel, a bell-crank to which said pawls are pvoted, a rotating crank-disk actuated from a suitable sonree of power, a connecting-rod connecting the bell-crank, and means, substantially as described, for varying th/e vibration of the bell-crank. g

9. In a pulverizing-machine, the combination, substantially as hereinbefore set forth,

IOS

with the feed-hopper, of the crushing-rollsin the interior of said hopper, the gear-wheels R R -upon the axes of the feed-ro1ls,tl1e pivoted pawls s s', engaging with the teeth/r l1 of the gear-wheels, the bell-crank .97, with the adjusting-link s and thethumbscrew s, the

' connecting-rod m3, engaging with the bell` crank S7, the cam-disk G, rotating lon* the shaft, the groove 'm' in the ca1n-disk, and the screw-nut m2, for setting and holding the con- Y nect-ing-rod at any point therein, and means f for imparting inotionvto the cam-disk, sub-` stantiallyas described. v

10. In a pu'lverizing-machine, the combination, with. the upper section of the'shell, of

lthe open ,lugs a3 on one side and the perforated ears a upon the other, the bolts c4, passing through the former, and the bolts b',

`passing through the latter, swiveled to the lower, section, and the screw-nuts upon the bolts for adjusting the twoparts of the shell to each other.

1l. In a pulverizing-inachine, the combination, with the outer shell, of an interior lining containing openings, the edges of which are bent in to receive bolt-heads, corresponding openings in the outer shell through which -said bolts pass, cupped or countersunk on the inner surface of `theshell to fit the cupping of thelining, and bolts provided with rounded heads in the interior of the machine, passing through said openings and secured by screwnuts 0n the outside of the machine, for the purposes set forth.

12. In a pulveriziug-machine, the combination, with the anged collar upon the driv-- ing-shaft of the machine, of radial arms provided with beaters upon their extremities terminating in beveled cross-heads, beveled' head tits, and a bolt passing through the y shoe and cross-heads for securing the former to the latter.

let. In a pulverizing-machine, the combination, with the radial arms fia, of the cross-heads- 7, with the beveled rectangular faces i, the

shoes I, with the rectangular countersunk. faces arranged to fit the faces z on the crossheads, and the bolts i4, with the heads is and the screw-n uts il, for securing the shoes to the cross-heads.'

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two Witnesses, this 29th day of June, 1888.

JOHN J'. BORDMAN.- l Witnesses:

WILLARD P. BUTLER, EDWIN T. RICE, Jr. 

